Question: Which organization act as subsidiary to OECD?
Paraphrase: What is the name of the organization that acts as a subsidiary to OECD?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q41550 wdt:P355 ?obj . ?obj wdt:P31 wd:Q43229 } 
Answer: European Conference of Ministers of Transport, OECD Development Centre